Messages in this thread |  | | Date | Wed, 11 Sep 2002 11:28:08 +0400 | From | Oleg Drokin <> | Subject | Re: 2.5 Problem Status Report |
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Hello!
On Wed, Sep 11, 2002 at 09:26:40AM +0200, Ingo Molnar wrote: > > > > BUG at kernel/sched.c open 10 Sep 2002 > > > What exactly is this? > > Looks like this is my bugreport for BUG in kernel/sched.c:944 in the middle > > of partition parsing output on boot. > > Subject of email was > > '2.5.34 BUG at kernel/sched.c:944 (partitions code related?)' > > msgid: 20020910175639.A830@namesys.com > very strange backtrace: > >>EIP; c0115818 <schedule+18/4a0> <===== > Trace; c01053a0 <default_idle+0/40>
I noticed it too.
> i've once seen the 2.5 IDE code doing a schedule_timeout() from an IRQ > handler, but the above has to be something else. Could you hack sched.c to > print out the exact preemption count? It could be a preempt-count > underflow due to an unbalanced spin_unlock, or an inbalanced > preempt_enable. [or the IRQ code - but i doubt that, we'd have seen
I have preemption disabled.
> problems much earlier if this was the case.]
> Oleg, do you have CONFIG_DEBUG_SPINLOCK enabled? That should catch an > unbalanced spin_unlock().
Yes, I do. CONFIG_DEBUG_KERNEL=y CONFIG_DEBUG_SLAB=y CONFIG_MAGIC_SYSRQ=y CONFIG_DEBUG_SPINLOCK=y CONFIG_DEBUG_HIGHMEM=y
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